ᴱ√PIQI root. “*bitter”
An unglossed root in the Qenya Lexicon of the 1910s with derivatives like ᴱQ. píqa “bitter” and ᴱQ. piqis(se) “grief” (QL/74). It also had derivatives in the contemporaneous Gnomish Lexicon such as G. pigwa “bitter” and G. piglin “urine” (GL/64). Later words for “bitter” were derived from the root ᴹ√SAG.
Reference ✧ QL/74